Abstract: In a decanter centrifuge having a rotor (1) and a screw conveyor (2) the rotor is suspended only at its one end, the rotational axis (R) of the rotor extending vertically. The inlet (22) of the rotor (1) for a sludge containing liquid to be separated as well as the rotor outlet (12; 67) for liquid having been freed from sludge are situated at the upper end of the rotor, whereas a sludge outlet (13) for separated sludge is situated at the lower end of the rotor. The rotor (1) as well as the screw conveyor (2) are adapted to be driven through shafts (5, 8) situated at the upper end of the rotor. By the invention it becomes possible by simple means to adapt the decanter centrifuge for different separation duties, since the location of the sludge outlet (13) can be chosen freely without other parts of the decanter centrifuge preventing this.

Abstract: In a decanter centrifuge having a rotor (1) and a screw conveyor (2) the rotor is suspended only at its one end, the rotational axis (R) of the rotor extending vertically. The inlet (22) of the rotor (1) for a sludge containing liquid to be separated as well as the rotor outlet (12; 67) for liquid having been freed from sludge are situated at the upper end of the rotor, whereas a sludge outlet (13) for separated sludge is situated at the lower end of the rotor. The rotor (1) as well as the screw conveyor (2) are adapted to be driven through shafts (5, 8) situated at the upper end of the rotor. By the invention it becomes possible by simple means to adapt the decanter centrifuge for different separation duties, since the location of the sludge outlet (13) can be chosen freely without other parts of the decanter centrifuge preventing this.

Abstract: The rotor of a centrifugal separator includes two axially separated end walls and one surrounding wall situated between the end walls. The end walls and a stack of separation discs within the rotor are maintained axially together by a central fastener. The surrounding wall, which is separate from the two end walls, is movable axially during rotor operation relative to at least one of the end walls. The surrounding wall has an inner diameter at the areas where it seals with the ends walls that is smaller than the portions between those sealing areas.